P1108

R : P0105, P1107, P1108. MAP Sensor.

R1 : CHECK THE GROUND CIRCUIT TO THE MAP SENSOR.
1. Measure the resistance between the MAP sensor electrical connector PI29, pin 4 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto R2

No
Repair the circuit between the MAP sensor and GROUND. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

R2 : CHECK THE POWER SUPPLY CIRCUIT TO THE MAP SENSOR.
1. Turn the ignition switch to the RUN position.
2. Measure the voltage between the MAP sensor electrical connector PI29, pin 2 (OY) and GROUND.

Is the voltage greater than 5 volts?

Yes
Goto R3

No
Repair the circuit between the MAP sensor electrical connector PI29 pin 2 (OY) and the the EMS 5 V supply from the PCM. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

R3 : CHECK CONTINUITY OF THE MAP SENSOR SIGNAL WIRE.
1. Measure the resistance of the circuit between MAP sensor electrical connector PI29, pin 1 (BK) and PCM electrical connector PI01, pin 127 (BK)

Is the resistance less than 5 ohms?

Yes
Goto R4

No
Repair the circuit between the MAP sensor electrical connector PI29, pin 1 (BK) and PCM electrical connector PI01, pin 127 (BK) For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

R4 : CHECK THE MAP SENSOR SIGNAL WIRE FOR SHORT TO GROUND
1. Disconnect the PCM electrical connector, PI01.
2. Disconnect the MAP sensor electrical connector, PI29.
3. Measure the resistance between PI29, pin 1 (BK) and GROUND.

Is the resistance less than 10,000 ohms?

Yes
Repair the short to GROUND. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
Goto R5

R5 : CHECK THE MAP SENSOR SIGNAL WIRE FOR SHORT TO BATTERY
1. Connect the PCM electrical connector, PI01.
2. Turn the ignition switch to the ON position.
3. Check for a voltage at PI01, pin 1 (BK)

Is the voltage greater than 5 volts?

Yes
Repair the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
Install a new MAP sensor. CLEAR the DTC. TEST the system for normal operation.